Chemistry: (6) Nuclear Chemistry and Electron Configuration

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Chemistry: (6) Nuclear Chemistry and Electron Configuration
2011-01-25 12:57:31

Chamistry last note sheet
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  1. when was radioactivity discovered?
    1896 by Marie Curie
  2. What is the difference between a nuclear and chemical reaction?
    • nuclear: involves nuclei
    • chemical: involves electrons
  3. what makes something radioactive?
    an unbalance of protons and neutrons
  4. What is transmustation?
    when the nuclues of a radiactive atom decays, it changes into the nucleus of a different atom
  5. what is a half-life?
    time it takes for one half of the sample of radioactive atom to decay
  6. What is nuclear fisson? What is it used for?
    nuclei are hit with neutrons and break down. used for bombs and to generate electricity.
  7. What is nuclear fusion? What is it used for?
    nuclei combine. Cannot be used becasue it happens at very high temps
  8. What does the Pauli Exclusion Principle say?
    orbital describes max of 2 electrons and they must have opposite sign
  9. What does the arrangement of electrons determine?
    element's properties
  10. What is an orbital?
    region of space where there is a high probability of finding an electron